Calculating the Potential Energy of Quarks in the Quark Model of the Neutron

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The quark model describes neutrons as composed of two down quarks and one up quark, resulting in a net charge of zero. To calculate the electric potential energy of these quarks, they can be treated as charged particles with specific charges: down quarks at -1/3 and the up quark at +2/3. The separation distance between the quarks is approximately 2 femtometers. The calculation involves determining the work done by the electrostatic force as the quarks are brought together from a distance. Understanding these interactions is crucial for exploring the fundamental forces within atomic nuclei.
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Quark Model of the Neutron According to the quark model of fundamental particles, neutrons-the neutral particles in an atom's nucleus-are composed of three quarks. Two of these quarks are "down" quarks, each with a charge of ; the third quark is an "up" quark, with a charge of . This gives the neutron a net charge of zero.

What is the electric potential energy of these three quarks, assuming they are equidistant from one another, with a separation distance of ?

I don't even know where to start! Help!
 
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You need to calculate the work done by the electrostatic force on each of the quarks as they are brought together from far away. So just treat them like three charged particles. The charge of the down quark is -1/3 and the up +2/3. The size of a neutron is about 2 femtometer.
 
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